In materials science, photoelasticity describes changes in the optical properties of a material under mechanical deformation. It is a property of all dielectric media and is often used to experimentally determine the stress distribution in a material.

Photoelasticity is a whole-field technique for measuring and visualizing stresses and strains in structures.The method utilizes a birefringent model of the actual structure to view the stress contours due to external loading or residual birefringence.

Photoelasticity, the property of some transparent materials, such as glass or plastic, while under stress, to become doubly refracting (i.e., a ray of light will split into two rays at entry). When photoelastic materials are subjected to pressure, internal strains develop that can be observed in.

Photoelasticity is a technique used in stress analysis testing based on the ability of a transparent non-crystalline material that is isotropic when free of stress to become optically anisotropic displaying stress characteristics when stressed.

Photoelasticity, being a strain-induced phenomenon, is exploited in reflection photoelasticity to study prototypes made of different materials, in orthotropic photoelasticity to study composites, and in photoplasticity to study strains beyond elastic limit.

2020年11月26日 · know how materials scientists use photoelasticity; be able to distinguish between isochromatic and isoclinic fringes; be able to relate stress patterns in polycarbonate rods to the bending rig used and the deformation in the rod; know and be able to …

Despite FEM advances, photoelasticity, one of the oldest methods for experimental stress analysis, has been revived through recent developments and new applications.

This chapter provides an understanding of the physical phenomenon of the photoelastic effects in isotropic and crystalline materials. It describes in detail research information on modern photoelastic materials and reviews the up‐to‐date photoelastic device applications.

Photoelasticity allows for the visualization of stress patterns by utilizing polarized light that interacts with stressed transparent materials. When these materials are subjected to mechanical stress, they become birefringent, altering the light's polarization state.

2020年11月26日 · The photoelastic effect (alternatively called the piezo-optical effect) is the change of refractive index caused by stress. Applications of photoelasticity involve applying a given stress state to a model and utilising the induced birefringence of the material to examine the stress distribution within the model.